Endress+Hauser Deltabar PMD55B, Краткое руководство по эксплуатации

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Electrical connection Deltabar PMD55B HART
12 Hauser
6.2.2 Terminals
• Supply voltage and internal ground terminal: 0.5 to 2.5 mm 2 (20 to 14 AWG)
• External ground terminal: 0.5 to 4 mm 2 (20 to 12 AWG)
6.2.3 Cable specification
• Protective ground or grounding of the cable shield: rated cross-section > 1 mm 2 (17 AWG)
Rated cross-section of 0.5 mm 2 (20 AWG) to 2.5 mm 2 (13 AWG)
• Cable outer diameter: Ø5 to 12 mm (0.2 to 0.47 in) depends on the cable gland used (see
Technical Information)
6.2.4 4-20 mA HART
2
3
4
Y
+ +
- - I
1
mA
A0028908
 1 Block diagram of HART connection
1 Device with HART communication
2 HART communication resistor
3 Power supply
4 Multimeter
The HART communication resistor of 250 Ω in the signal line is always necessary in the
case of a low-impedance power supply.
Take the voltage drop into consideration:
Maximum 6 V with a communication resistor of 250 Ω
6.2.5 Overvoltage protection
Devices without optional overvoltage protection
Equipment from Hauser fulfills the requirements of the product standard IEC / DIN
EN 61326-1 (Table 2 Industrial Environment).
Depending on the type of port (DC power supply, input/output port) different testing levels
according to IEC / DIN EN 61326-1 against transient overvoltages (Surge) are applied (IEC /
DIN EN 61000-4-5 Surge):
Test level on DC power ports and input / output ports is 1000 V line to earth
Overvoltage category
Overvoltage category II